from flask import Flask, render_template
from flask import url_for, json
from flask import jsonify, request
from werkzeug.utils import secure_filename

app = Flask(__name__)


@app.route('/')
def hello_world():
    return 'Hello World'


@app.route('/user/<name>')
def username(name):

    # 通过数据库查询
    # 通过数据库修改
    # 其他业务操作
    # 修改相关信息，并且反馈到前台
    if(name == "张三"):
        name = "真是张三"
    else:
        name = "不是张三,不是" + name

    return '<h1>hello,%s</h1>' % name


@app.route('/user/show')
def user():
    users = [['张三', '男', '重庆'],
            ['李四', '女', '河南']]
    return render_template("user.html", list=users)


@app.route('/url/')
def redirect_to_url():
    return url_for('post_show', post_id=666)


@app.route('/post/<int:post_id>')
def show_post(post_id):
    return 'Post ID : %d' % post_id


@app.route('/getJson/')
def getJson():
    data = {
        "name": "张三",
        "sex": "男",
        "age": 20,
        "address": "xxxxx"
    }
    # 将数据转json，这个数据可以是任何
    return jsonify(data)


# Get Post传参
@app.route('/login', methods=['GET', 'POST', 'PUT'])
def login():
    data = "无数据"
    if request.method == 'GET':
        print("当前请求方法是GET")
        username = request.args.get('username')
        address = request.values.get('address')
        data = {
            "username" : username,
            "address" : address
        }
    elif request.method == 'POST':
        print("当前请求方法是POST")
    elif request.method == 'PUT':
        print("当前请求方法是PUT")

    print(data)
    return jsonify(data)


# 传递json
@app.route('/passJson', methods=['POST'])
def passJson():
    data = json.loads(request.get_data(as_text=True))

    # 写业务程序
    return jsonify(data)


# 上传文件
# 步骤1，创建路由，创一个到静态文件的路由
@app.route('/upload/index')
def toUploadPage():
    return render_template('upload.html')


# 步骤2，静态文件中所有文件上传功能，点击该功能上传文件
@app.route('/upload', methods=['POST'])
def upload():
    if request.method == 'POST':
        file = request.files['file']
        print(request.files)

        file.save(secure_filename(file.filename))

        # 可以做其他业务，不如人脸识别等等
        return "文件上传成功！"
    else:
        return render_template('upload.html')


if __name__ == '__main__':
    app.debug = True
    app.run()
